掌骨头 - Caput ossis metacarpi

影像

描述

The Head or (Digital Extremity) presents an oblong surface markedly convex from before backward, less so transversely, and flattened from side to side; it articulates with the proximal phalanx. It is broader, and extends farther upward, on the volar than on the dorsal aspect, and is longer in the antero-posterior than in the transverse diameter. On either side of the head is a tubercle for the attachment of the collateral ligament of the metacarpophalangeal joint. The dorsal surface, broad and flat, supports the Extensor tendons; the volar surface is grooved in the middle line for the passage of the Flexor tendons, and marked on either side by an articular eminence continuous with the terminal articular surface.


结构高低级

大体解剖 > 骨, 骨骼系统 > 附肢骨骼 > 上肢骨, 自由上肢骨 > Pars libera membri superioris > 手骨 > 掌骨 > 掌骨头

翻译